Statistics for occurrence #1 of “Roanoke river” in chapter 15 of D. H. Hill, Jr., Confederate Military History, a library of Confederate States Military History: Volume 4, North Carolina:

...brigade, the Forty-third North Carolina regiment, of which your distinguished citizen, Thomas S. Kenan, was colonel, and several batteries of artillery, assisted by the ram Albemarle operating in the Roanoke river . Capturing Plymouth (April 20, 1864), after one of the most brilliant of assaults, with some 2,500 prisoners and large supplies of provisions and munitions of war, General Hoke marched to Washing...
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